package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import com.sky.exception.AopAutoFillException;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

import static cn.hutool.core.bean.BeanUtil.setFieldValue;

@Component
@Aspect
@Slf4j
public class AutoFillAspect {

    @Pointcut("@annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut() {
    }

    @Around("autoFillPointCut()")
    public Object autoFill(ProceedingJoinPoint pjp) {
        System.out.println("开始进行数据填充");
        Object[] args = pjp.getArgs();
        //获取参数
        Object arg = pjp.getArgs()[0];
        //获取对象的class对象
        Class<?> aClass = arg.getClass();
        Signature signature = pjp.getSignature();
        //获取方法
        Method method = ((MethodSignature) signature).getMethod();
        String methodName = method.getName();
        try {
            if (methodName.contains("save") || methodName.contains("add")|| methodName.contains("insert")) {
                //添加操作：设置创建时间、更新时间、创建人、更新人
                aClass.getMethod("setCreateTime", LocalDateTime.class).invoke(arg, LocalDateTime.now());
                aClass.getMethod("setUpdateTime", LocalDateTime.class).invoke(arg, LocalDateTime.now());
                aClass.getMethod("setCreateUser", Long.class).invoke(arg, BaseContext.getCurrentId());
                aClass.getMethod("setUpdateUser", Long.class).invoke(arg, BaseContext.getCurrentId());
            } else {
                //更新操作：设置更新时间、更新人
                aClass.getMethod("setUpdateTime", LocalDateTime.class).invoke(arg, LocalDateTime.now());
                aClass.getMethod("setUpdateUser", Long.class).invoke(arg, BaseContext.getCurrentId());
            }
            Object proceed = pjp.proceed(args);
            return proceed;
        } catch (Throwable e) {

            log.error("自动填充数据异常{}", e);
            throw new AopAutoFillException("自动填充数据异常");
        }
    }

    /**
     * 前置通知，在通知中进行公共字段的赋值
     */
    /*@Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint) {
        log.info("开始进行公共字段自动填充...");

        //获取到当前被拦截的方法上的数据库操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();//方法签名对象
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);//获得方法上的注解对象
        OperationType operationType = autoFill.value();//获得数据库操作类型

        //获取到当前被拦截的方法的参数--实体对象
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0) {
            return;
        }

        Object entity = args[0];

        //准备赋值的数据
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();

        //根据当前不同的操作类型，为对应的属性通过反射来赋值
        if (operationType == OperationType.INSERT) {
            //为4个公共字段赋值
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                //通过反射为对象属性赋值
                setCreateTime.invoke(entity, now);
                setCreateUser.invoke(entity, currentId);
                setUpdateTime.invoke(entity, now);
                setUpdateUser.invoke(entity, currentId);
            } catch (Exception e) {
                e.printStackTrace();
            }
        } else if (operationType == OperationType.UPDATE) {
            //为2个公共字段赋值
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                //通过反射为对象属性赋值
                setUpdateTime.invoke(entity, now);
                setUpdateUser.invoke(entity, currentId);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }*/
}
